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Syringe Test - rates of reaction.

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Introduction

Syringe Test Formula Word: - Calcium Carbonate + Hydrochloric acid = Calcium Chloride + Water + Carbon Dioxide Symbol: - CaCO? + 2HC = CaCl + H 0 + CO Equipment: - Flask, Glass gas syringe, Bung, Marble chips (Calcium Carbonate (CaCO?)) and tubing. Safety Because of the dangerous chemical that will be handled goggles should be wore during the experiment in case any should get in your eyes while the chemical is being measured and the experiment is happening. Fair test * The amount of hydrochloric acid is the same (20ml) for every experiment using more or less of it in each one would highly affect it making the results erroneous and useless. * The same amount of marble chips is used (2gs) for every experiment if the amount was too varied the results would be unusable. * The test was repeated two times to ensure fair and accurate results from averaging. * Washing each apparatus that I use so that there is no pass over of acid or other substance. ...read more.

Middle

If left long enough all the experiments will emit the same amount of gas, the change of molar will only affect the speed it takes. The reason this happens is because of the collision theory, this states that when a molar is increased it means that there are more acid particles in the same space for example a 0.25 molar acid the will be x amount of acid in one area but in a 0.5 molar the will be twice the amount of x in the same amount of space( Fig 2 and Fig 3). This prediction came from my preliminary results although I only had time to do 2 tests I try 0.25 molar and 2 molar so I would get a good contrast in results from this I find that at 0.25 molar I got a very slow reaction and was only at 3 by the end, but in contrast 2 molar acid was very fast for and the numbers were off the scale before I had finished timing the experiment. ...read more.

Conclusion

Explanation If I did this experiment again I would try to repeat the experiment again so I can get a more accurate average between the 3 results which would make them more useful to support my prediction and evidence to make my ideas and prediction be more beneficial for my conclusion. I would also take note of how many blocks were used and make a mention of how these effect the experiments. Results table 20 40 60 80 100 120 140 160 180 200 0.25 0 0 0 0 0 1 1 1 1 1 1 2 1 2 2 3 2 3 3 4 0.5 0 2 2 5 3 6 4 8 4 8 6 8 6 9 7 10 9 11 10 11 0.75 3 5 5 10 7 15 9 23 11 25 14 30 27 34 31 36 33 38 36 40 1 2 9 7 15 13 20 20 28 24 34 30 36 35 43 41 47 50 47 55 55 2 21 20 35 40 63 65 82 80 92 90 Os 98 Os Os os os os os os os Jack Fieldhouse 10AH ...read more.

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